Accumulating device



March 13, 1956 J. E. DAYGER EI'AL 2,738,130

ACCUMULATING DEVICE Filed April 1, 1953 5 Sheets-Sheet 1 IN VEN TOR. JONAS E. DAYGER GEORGE F. JANAUSHEK AGENT March 1956 J. E. DAYGER ETAL ACCUMULATING DEVICE Filed April 1, 1953 5 Sheets-Sheet 2 3 517/ y e @433 2 I f K R% wa TYm m VEM fl mu mm x Jo E G AGENT March 13, 1956 J. E. DAYGER ETAL 2,738,130

ACCUMULATING DEVICE 5 Sheets-Sheet 5 Filed April 1, 1953 10'CONTACTS 69 IN V EN TOR. JONAS E DAYGER GEORGE F. JANAUSHEK FIG. 6

BY l kw AGENT March 13, 1956 J, E. DAYGER ETAL ACCUMULA'IING DEVICE 5 Sheets-Sheet 5 Filed April 1, 1953 A N m? E s m WSW MM 5 O J0 k United States PatentO ACCUMULATINGLDEVICE Jonas-1E. Dayger, Binghamton, and- George F. Janaushek,

Vesta l,.N. Y., assignors to International Business llflachinesCorporation, New York, N. Y., a corporation QfN o Application April .1, 1953, Serial No.3465098 v6.,Claims. (Cl. 235.-.-61.6)

invention relates generally to accumulating neehanismsfor accounting machines and pertains more specifically toaccurnulators of the-type'which are-open,

able step by step by successive electrical impulses.

The invention is designed as an improvement over the step .bystep operated accumulator disclosed in Patent 2.,480,744, issued toMr. C. D. Lake et al.on.August 30, 1.949. The patented accumulator embodies a ratchetoperated accumulator wheel actuating means which is positively reciprocated by an armature reciprocated by two magnets energized in succession. Two impulse transmittingmeans transmit in spaced relation groups of ,diiferentially timed electrical impulses to said magnets.

to,-etfe ;t successive unit operations of the accumulator M'heelto enter the desired digit. It hasbeen found that ;whe re.alarge number of these accumulators are. employed in, a record controlled machine, such-as the type 10,l

,IBM statistical machine, the-required successive groups of impulses automatically transmitted in alternating sequence to the twomagnets of each accumulatortoefiect the subsequent steps of operation of the accumulator wheels placed the machine under an exceedingly ,heavy ,load making it necessary to provide a rather large power s pp y- :lAccordingly, a principal object of the invention is to .providean accumulator of the impulse controlled .type lwhich operates more simply, more economically and g with Jess power requirements.

A, further object and feature of theinventionresides in the provision of means for effecting a units carry impulse through the normally closed add, subtract andres et ,control'contac ts of the accumulator along with-thecusternary ?ltcontacts which are underthecontrol of the accumulator wheel thereby eliminating the usual carry relays.

furtherv object of the invention pertains to;the.pro- .vision ofaunits carry means which will add an extra unit by the carry impulse to the accumulator duringaddition and subtraction to bring the readout to the proper digi-t, position.

f A still further object resides in the provision of.meaus for resetting an accumulatorunder control ofthestep step impulses of the readout during a readoutcycle.

,A still further object of the invention resides ,in the i plate 20.

2,738,130 Patented Mar. 13, 1936 ithe accompanying drawings, which disclose,gby way .of

example, the principle of the invention and the best mode, which has been contemplated, of applying-thatprinciple.

Inthe drawings:

Fig. 1 is a view in side elevation'of an assembled accumulating unit constructed according ;to the present invention.

Fig. l is a view in side elevation of an assembled accumulating unit constructed according to the present invention.

Fig. 2 is an end View taken on the line 2-2 of Fig.1

Fig. 3 is a transverse sectional view taken on the line 33 of Fig. 1.

Fig. 4 is a longitudinal sectional view taken on the line 4-4 of Fig. 3, showing the details of the digit readout unit.

Fig. S-is a perspective view showing-the contact'assembliesassociated with each accumulatorwheel.

Fig. 6 is a'timing chart.

Figs. 7a and 7b-taken together form a wiring diagram showing-the electrical wiring connectionsof the'instrumentalities employed for two orders of the accumulator constructed according to the present invention.

The parts and mechanism forming each of them:-

: ,cumulator-units are carried by a supportvplate which v is .mounted in a vertical plane in the machine. As,is-;well known, to form a multidenominational amount receiving accumulator a plurality of such units are mounted side -by side and electricallyinterconnected in a mannerrt'ozbe describedso that units carries or transfers may:be;effected from each lower order accumulator wheel to ,the ,next 'higher'order wheel. Carried by the plate 20 '(Fig. 1) is an add magnet 21 having an armature 22 which is pivoted at 23 to a yoke member 24. The right-hand end of the-armature 22 has attached thereto a stud '25 on which is pivotally mounted an upstanding lever26.

Pivoted'on a stud 27 carried bythe lever 26 is anoperatingpawl-28and said pawl is urged'by aspring -291which isextended from a tail of the pawl28 to a support plate 30, into engagement with a tooth 31 of ,aratchet wheel 32. The support plate 30 is mounted -on an internally thre aded,st ud 33 on the plate 20 by means of a slot 34 and screw 35, said slot 34 and screw 35 affording a-means for adjusting the tension of the spring 29.

Itis evident that when the armature 22 is attracted by the core of the energized fadd magnet 21 it will rock the lever 26 clockwise about its pivotal'stud 36 and pawl 28 willbe moved to the right under thenow idle.ratchet ((1 3132 to engage the next tooth: to the right; thereof. In; such position the pawl 28 is in a position to-rotatethe ratchet wheel 32 clockwise one ratchet tooth when the -;-rna gnet 21 is ie-energized. When the magnet 21.is.dee nergize d thetension of spring 29 is sufficient to positive- 1y rock the lever 26 counterclockwise to effect-the. onetoothrotation of ratchet wheel 32. In this manner a unit is; entered for each reciprocation of lever'26t The accumulator wheel assemblyfor each order consists of an add ratchet wheel 32, aratchetqwheel 387 which is associated with a retrograde preventing;mechanism-to be described and which is also used tolateh;.a contact in closed position when the first unit is entered, ;.andtwo control earns 38 and 39 associatedwith the units carry mechanism.

By any suitable means the two ratchet wheels32, 3,7 and the two cams 38, 39 are fastened to spacer discsttfl 3.) and they, in turn, are attached by any suitable means to a shaft 41. From Fig. 3 it vwillbest;en thatQa reduced end 42 of the shaft 41 is journaled ina br acket '43 which is carried by the plate 20. The other end of shaft has a reduced portion 44 and is' journaledl in the The retrograde preventing mechanism consists of a machines.

lever 45 (Fig. 1) which is pivoted upon the stud 36, said lever 45 being normally urged in a counterclockwise direction about stud 36 by means of a spring 46 mounted within a slotted block member 47 carried by the plate 20. The lever 45 has a hook shaped portion which engages the teeth 48 of the ratchet wheel 37 and it will be evident that during unit entries to the magnet 21 the lever 45 will be cammed clockwise by the teeth 48 onratchet wheel 37. At the end of each one-tooth movement of the ratchet wheel 37 the spring 46 will pivot lever 45 counterclockwise and the hook shaped portion of said lever will engage a tooth 48 on the ratchet wheel 37 to prevent retrograde or counterclockwise movement of the ratchet wheel and cam assembly.

Additive entry operations embodiment includes means for effecting additive entries under control of a perforated record 49 shown in Fig. 7a. The record analyzing means is shown diagrammatically since it is well known in record controlled accounting As is well known, a differential location of a perforation determines the digital value. For the illustrative form of a card a perforation near the front edge "of the card may represent a special position punching,

a perforation at the position represents 5 in the units order and a perforation at the 9 position represents 9 in the highest order. The entering means will best be understood by reference to the wiring diagram of Figs. 7a and 7b, it being noted that for purposes of simplicity only two denominational orders are shown but obviously the capacity may be increased according to entry requirements. As a further illustration of the embodiment of the present invention the accumulator orders may be considered to be a part of the well-known IBM reproducing punch disclosed in Patent Re. 21,133 and the brushes 50 (Fig. 7a) may be considered to be the same as the read considered the same as the punch magnets PM shown in Fig. 10b of said patent.

For conditioning the machine for addition under control of a series of cards 49 which, as is well known, automatically and sequentially pass through the record analyzing means, those cards which are to be added may have a perforation set aside in a particular column of'thecard which is used to effect energization of a plus control relay which in turn conditions the accumulator to add. The circuit for energizing the plus control relay extends from line 51 (Fig. 7a), wire 52, cam contact C9, CL .card lever contacts (which, as is well known, are physically closed by the cards as they pass through the -machine), common contact roll 53, brush 50 for the column having the 0 perforation, plug connection 54, the pick coil plus control relay R457 and line 55. Relay R457 holds up through a circuit which extends from line 51,"wire 56, cam C27, contacts R4571 now closed, the hold'coil of relay R457 and line 55. Accordingly, the R457-3 and R4574 contacts (Fig. 7b) remain transferred throughout the sensing of the digits 0 through 9 to condition the accumulator orders for adding. It is to be understood that the plus control relays need not be controlled by a signal from the card. They may be controlled, for example, from a machine cycle impulse when it is desired to add all of the cards.

Referring to Fig. 7b it will be seen that there are two canicontacts C29 and C30 connected in parallel. These cam contacts provide the add impulses to all of the add magnets of the accumulator units and they are timed to emit nine short impulses, the first between 0" and ..1 time and the last between "8 and 9 time on the machine index as shown in Fig. 6.

With the plus control relay R457 energized, as previously described, a circuit is completed from line 51 (Fig. 7b), wire 57, cam contacts C29 and C30, the normally closed side of contacts R463-2, contacts R4574 now transferred, normally closed side of con tacts R4584, normally closed side of contacts R4507, the add magnet 21 in the units order and line 55. The units order add magnet 21 then will be impulsed once for each digit position on the record card until the read brushes 50 sense a hole and for each impulse the related ratchet wheel 32 will move clockwise one tooth position as previously described. A similar circuit is completed to the add magnets of all the accumulator units being used to start their accumulator wheels turning.

It should be mentioned at this point that all of the accumulators are reset to 9, by circuits to be later described, at the end of an opening cycle and consequently the first impulse to the add magnet will move the accumulating wheel from 9 to 0. This will be understood by referring to Fig. 4, which is a view looking at the back of an accumulator unit plate 20 and showing a well known type of accumulator digit readout unit. When an accumulator is reset to 9 a wiper 58 will be in contact with a contact strip 59 corresponding to position 9 and a wiper 60 will be in contact with a common conducting segment 61. When the first impulse is received by the add" magnet 21 the accumulator wheel will turn one tooth and now wiper 58 will be in contact with the common conducting segment 61 and wiper 60 will be in contact with the contact strip 59 corresponding to 0 indicating that the accumulator has moved from 9 to 0. The readout unit will be described more in detail later in connection with the readout circuits. The movement of the accumulator wheel from 9 to 0 is significant at this point because the normal carry circuit that takes place is utilized to bring the accumulator wheel to the correct digit position during adding and subtracting cycles.

' Referring to Fig. 7a it may be seen that the card is fed past the sensing brushes 50 with the 12 edge first. Assuming, for example, that the five hole on the card is to be added the add magnet 21 for the units position accumulator will receive five impulses from cams C29 and C30 (between 0 and 5 time on the machine index) until the five hole is sensed. When the five hole is sensed a circuit is completed from line 51 (Fig. 7a), wire 52, cam contact C9, CL card lever contacts, common contact roll 53, brush 50 for the column having the 5 perforation, a plug wire connection 62 to the entry hub for the units position accumulator (Fig. 7b), normally closed contacts R453-4, the second pick coil of count control relay R463 and line 55. The hold circuit for relay R463 extends from line 51, wire 63, cam contacts C31,

wire 64, contacts R463-1 now closed, the hold coil of relay R463 and line 55. The energization of count control relay R463 transfers contacts R4632 in the circuit to the add magnet in the units position and as a result the accumulator wheel stops after having received five pulses from C29 and C30.

Looking at Fig. 4 it will be seen that with the accumulator reset to 9 five impulses to the add magnet 21 will position the wiper 60 on contact strip 59 corresponding to the 4 position and as such the accumulator would read out a 4 instead of the 5 that was sensed. The added impulse required to bring the accumulator readout to the 5 position is effected when the accumulator wheel passes from 9 to 0. As is well known, carry circuits are effected between accumulator orders by the mechanical closure of a 10 contact as each accumulator wheel passes from 9 to 0. The mechanism for closing the 10 contacts will be described in detail later and it will sufiice for now to say that closure of the 10 contact for the units position accumulator will complete a circuit at carry time from line 51 (Fig. 7b), wire 65, cam contact C28, the "10" ou act in the units ,position .now closed, the normally closed side of contacts R457-3, normally closed sidepf contacts R458.3, normally closed ,side of contacts R450 -6,:,the add magnet 21 in the tens positiontand .line 55. ,Since the tens position accumulator .wasreset to 9 the carry impulse will cause the tens accumulator wheel to pass from 9 to 0. However, ;before; the carry irnpulse terminates and the tens accumulator wheel nctually moves, the carry impulse is also directed; from the "contact in the units position-through the closed T-.9 contacts-in the tens order. the normally closed side 0f contacts 3R450-3, the carry exit hub (sinqe only a two-position-accumulator unit is shown), plug wire.;conianection66 tothe carrygentry hub,;nor mally closedcon- -;tacts R4505,: normally closed side of contacts .R.45,7. -.--.4, ,normally ,closed side of contacts R458-4, the normally closed'side of contacts R4507, addmag- ,net 21 ingthe unitsposition and line 55. It is ,-evident ythat with :theabove-described carry impulse the units -;position accumulator into which the sensed five perforation was entered will-actually receive six impulses and as. aresult its related wiper; 60 will be positioned on the contact strip 59 corresponding to the 5 positionindicatingzthataS has been added into the accumulator. gAddition istsimilarly accomplished in all of theaccunmlator positions.

S ubstraction entries The machinetmay also'be conditioned to etiect subtraction of amounts representedby a series of cards.

Subtracting operations are performed by the comple-' mental process, that isto say, a digit'is entered-in each order which is the 9 scornplement of the represented digit. For example, to enter 95 subtractively-the-number 999 04 would be entered in the accumulator. A- ninewill be entered for all zeros inanumber.

The machine is conditioned for subtracting-operations by energizing a minus control relay R458 (-Eig. *7a) from a perforation in the card in the same manner that plus control relay R457 was energizedfor adding-operations. Relay R458 willhold up through the -reading ,portion of the machine cycle by a circuit which extends 1 from line 51, Wire'56, cam contact-27, contacts R458-1 now closed, the hold coil of vrelay R458 and line 55.

Referring to the units position accumulator it may be seen that contacts 'R458,4 now transfer to signal a subtraction operation but; the circuit to the "add magnet 21 will remain open until count control'relay R463 is energized to transfer contacts R463-'-2. As was described in connection with addition, relay R463-willbe r energized when the sensing brushes sense a hole in the card. Using the S perforation again, at 5 time in the machine cycle sensing brush willcompletethe .circuit to energize the second pick coil of relay R463 and a circuit will be completed from line '51, wire 57, cam 1 contacts C29 and C30, contacts R463'2-now transferred, contacts R458-4 now transferred, the normally closed side of contacts R450-7, the fadd magnet 21 in the units position-rand line 55. Referring to Fig.6 it can be seen that cam contacts C29 and C30 will transmit four impulses tothe magnet 21 between 5 and 9" time on the machine index and accordingly the unitsaccumulator wheel would bepositioned with wiper in contact :with contact strip 59 corresponding'to positionB. However, as was previously described, the usual carry impulse will add one more pulse to magnet llbetween 9 and 0 time and consequently the accumulator wheel will actually bepositioned at 4 which is the complement of the five-holesensed. Subtractionon a 9s complement basis is similarly carried out in allot the accumulator --.POSitio.ns.

Units carry means The units carry, means provides for the entry of a unit to an accumulator wheel when the next lower order wheel ,zpasses from 9 to O. The carry means consists of elect a e c rcu t w c h eal eady ee siesc i d-ta he c only the mecha c st tur Y n ssa y t e fe .69, counterclockwise. 10

a, carry operatiom whichin itself is .well known, will be generally, explained.

. Refe rring,to Fig. 5, cam 39 has two cam projections 67 which are alternately efi'ective at each half revolutionofithe accumulator wheel when it passes from 9 to 0-, to rock a double arm .68, pivoted on a support rod The left end of the arm 68 carries a.j,block 70 of insulating material which normally overlies a spring blade of contacts which make up the customary .10 contacts, .Counterclockwise movement hold the 10 contacts closediuntil after carry time ,at whichtime a circuit is provided .to energizea magnet ,7; which attracts its,armatu re and the latter, by co- .operationwith a tail 7.6 of the latching arm 72, will. rock the same counterclockwise to unlatch the arm, 68. This ,circuitextends from line 51 (Fig. 7b),:wire ,77, cam

contacts C3g2, latch magnets 74 for all accumulator posi- Oneteature of the present invention is the manner in which the carry circuits have been simplified. -Recalling to mind the ;car ry,circuits previously described in w nection with. the adding operations it will be noted thatcarry is.affected by a single add impulse whichwill .test .all -pfthe accumulator 10 contacts every cycle,

;each transferred contact completing the circuit to the next ,high,ordert accuroulator addmagnet, adding one. Such ,an varrangement eliminates theexisting practice of ,en-

'' ergizingcary relays to transfer a group of related contacts so asJo prepare the carry circuits for unit carry ;.operations upon theclosureof the 10 contacts.

Provisionis also made, as is customary,-tO C mcur- .rent lyzeiiectsa carry to a still higher order if this order stands at 9 and a units carry causes the next lowenorder wheel to pass from 90. This is performed under control of the customary 9 contacts. Referring to Fig. 5 cam 38 has two recesses 78 which are alternately effective at each half revolution of the accumulator wheel when it represents 9 ,to allow an arm 79 loosely'pivoted on the support rod 69 to rock counterclockwise. Upon such movement a block-8i) of insulating material, cattached to the end of the .arm 79 and overlying a spr ng blade of contacts which make up the 9 contacts, is lowered to close same. Referring, to Fig. 7b;it ca n be .seen that if the-9s contact is closed in the tens order the impulse circuitjhroughthe l0 contactsin the. units order, which was previouslytraced, is. immediately extended through the 9 contacts in the-tens order, and the. normally closedside of contactsR450 3,-and thence to the carry exit hub. Thus it is notnecessary to wait until the 10 contacts in the tensorder-are closed to effecta carry;and carries in a plurality of orders are-concurrently eitected under such circumstances.

' Total readout means well-known construction and consists of a plate of insulating materialSlwhich is secured by any suitable -means to the support plate 20-as is, therefore, station- 'ary with respectto the rotatable wiper structure 82.

This wiper structure fits over'a flattened portiony83 of the right-hand end of shaft 41 and is secured thereto by a screw 84. The wiper structure, as previously mentioned, consists of the wipers 58; ar 1d60, oneof which makes contact 'with' the common conducting segment 61 as the'other wiper makes-contact with digit representing contact points-whieh-are carried byplate 81.

There is a diagrammatic showing of the readout in Fig. 7b and associated electrical connections. Emitter EM shown in Fig. 7b transmits a series of differentially timed impulses (see Fig. 6) to the digit representing contact points to thereby transmit differentially timed digit representing impulses selected according to the contact point 59 contacted by a wiper, to punch magnets PM1 and PM2. A plurality of punch magnets is provided, one for each denominational order, and each is energized by a difierentially timed digit representing impulse when the machine is signalled to take a readout cycle. For punching a total standing on the accumulator, a punching mechanism may be provided such as is shown in the patent to C. D. Lake, No. Re. 21,133. This type of punching mechanism is well known and, therefore, is not shown herein.

A total readout cycle is initiated by plug wiring from an all cycles impulse hub (Fig. 7a) to a readout hub to energize a readout control relay R453. The circuit extends from line 51, wire 85, cam contact C21 which closes to transmit a control impulse once each cycle as shown in Fig. 6, all cycles impulse hub, plug connection 86, readout hub, the pick coil of relay R453 and line 55. Relay R453 holds throughout the readout cycle by a circuit which extends from line 51, wire 87, cam contact C22, contacts R453-1 now closed, the hold coil of relay R453 and line 55.

With the example 5 added into the units position accumulator at 5 time in the cycle a circuit will be initiated from line 51 (Fig. 7b), wire 88, emitter EM 5 spot, normally closed side of contacts R4598, contact 59 corresponding to position 5 on the accumulator readout commutator, wiper assembly 82 in the 5 position, common strip 61, wire 89, normally closed contacts R463-3, readout control contacts R4533 now closed to the exit hub for the units position accumulator. The counter exit hub is plug connected to one of the punch direct hubs (Fig. 7a) to complete the circuit through a punch magnet PM1 or PM2 and line 55 resulting in the punching of a 5.

A subtracted entry is read out in a similar manner through an inversion relay which is energized when a negative balance test impulse finds a 9 in the high order counter position. The test impulse circuit is conditioned between 9.5 and "11.6 time of every cycle by the energization of relay R74 (Fig. 7b) through a circuit which extends from line 51, wire 90, cam contact C15, the pick coil of relay R74 and line 55. Assuming, then, that the tens position accumulator stands at 9 indicating a subtraction entry Was made in the two position accumulator group shown, a circuit will be initiated at 11 time of the cycle which extends from line 51 (Fig. 71)), wire 88, the 11 spot of emitter EM, contacts R741 now transferred, the 9 contact segment of the tens position accumulator, wiper assembly 82, common segment 61, wire 91, contacts R742 now closed, and the negative balance test exit hub. The negative balance test exit hub is plug connected to the negative balance control hub (Fig. 7a) to complete the above circuit to the pick coil of inversion relay R459 and line 55. The hold circuit for relay R459 extends from line 51, wire 87, cam contact C22, contacts R4591 now closed,

the hold coil of relay R459 and line 55. Referring to 1 Fig. 7b it can be seen that with the contacts R4593 through R45912 transferred that the digit read out of the, accumulator will be the 9s complement of the digit that was entered into the accumulator. For example, a 7 in the acumulator will read out as a 2. This is a wellknown practice with respect to reading out subtractive entries and further discussion of same is not believed to be necessary.

The negative balance test-impulse at 11 time is also directed from the R74-2 contacts, through the normally I closed R4563 contacts to a negative balance punch hub. The negative balance punch hub is generally plug connected to a punch direct hub (Fig. 7a) to effect the punching of an X designation in all negative balance cards.

The R4563 contacts are used to prevent the negative balance test impulse from reaching the negative balance punch hub whenever the accumulator group fails to receive an entry. This feature provides a useful means for distinguishing between a zero balance condition caused by non-entry into the accumulator group due to inactive cards and a zero balance resulting from a series of computations from active cards such as adding a series of amounts and then subtracting a series of amounts the sum of which equals the sum of the amounts added. In the case of non-entry the accumulator never leaves its reset position of 9. In the case of entry with zero balance the accumulator returns to its reset position of 9. In either case, then, the highest order position of the accumulator group will be standing at 9 and consequently will emit the negative balance test impulse.

To carry out this function a negative balance X punch suppression relay R456 is provided. This relay is energized whenenver reset relay R450 becomes energized by a circuit which extends from line 51 (Fig. 7a.), wire 87, cam contact C22, contacts R4501, the pick coil of relay R456 and line 55. Relay R456 holds through a circuit which extends from line 51 (Fig. 76:), wire 101, the normally closed minus control relay con tacts R458--2, normally closed plus control relay contacts R457-4, contacts R4561 now closed, the hold coil of relay R456 and line 55. It is evident that if neither plus control relay R457 nor minus control relay R458 is energized to effect an entry into the accumulator group, the hold circuit for relay R456 will be completed and contacts R4563 will remain open to prevent the punching of an X. Upon an entry into the accumulator group either contacts R457-2 or contacts R458-2 will be open to prevent relay R456 from holding up and the R456-3 contacts will close to complete the X punching circuit.

Punched card groups may be run through the read feed of the well-known reproducing punch disclosed in Patent Re. 21,133 and entries made into accumulator groups. A summary card may be fed through the punch feed for each group of cards in the read feed in which will be punched a summary of the information accumulated from its related card group. On a zero balance condition each summary card will be punched with zeros and only those summary cards which are controlled from an accumulator group, which is at zero balance as a result of a series of computations, will be X punched.

Resetting 0f the accumulator The resetting of an accumulator having an additive entry therein takes place during the readout cycle and is brought about by plug connecting an all cycles impulse hub (Fig. 7a) to a reset hub to complete a circuit through the normally closed side of contacts R459-2, normally closed side of contacts R455-2, the pick coil of reset relay R450 and line 55. The hold circuit for relay R450 extends from line 51, wire 87 cam contact C22, contacts R450-1 now closed, the hold coil of relay R455 and line 55.

Referring to the units position accumulator it can be seen that the readout circuit previously traced to emit a 5 impulse from the exit hub will, when the accumulator is signaled to reset, also extend through the normally closed R56-2 contacts, contacts R450-7 now transferred, add magnet 21 and line 55.

Referring once again to Fig. 5 there is seen a third arm 93 pivoted on the support rod 69 and having a block 94 of insulating material which normally overlies a spring blade of contacts which make up what is hereinafter called the A" contacts. The arm 93 is rocked by the teeth on the accumulator ratchet wheel 37 and when the latch magnet 74 is energized after carry time each cycle, as previously described, a latching bell terankflsloose-on the rod .73 .wilhdisengage the right .terminal end .of .arm .93 allowing .said arm 93 to .rock tclock-tithe thereby,opening tl'te A.contacts. IIThe A tmntacts .will .remain open -until .the reset circuit .above tm q i g transmits -.animpulse to :the accumulator add .magnet. ,-As the ,.-accumulator ratchet .wheel 37 moves .asla result-of thisaimpulse the arm :942Wi1lib6 rocked countercloekwise closing the .A contacts. ;'The bell crank arm 95 will hold the A contactsclosed until-the ,latch magnet 17-4 :receives another I impulse.

With the-closurevof the.A;contacts a circuit is com- ;pleted,from.:line 51 (:Fig. 7b) wire 63, cam-contact. 31, -.wire =96, contacts R450:2 211OW;CIOSCd,'thC ;'A comtacts,;for,.,the units;position-.accumulator nowclosed, the first ,-;pick.;coil of ;count control trelay R463 and line 55. Relay R463 tholds ;through .the 1R4631 contacts and contactesl.as; revious1y described. Energization of relay, :eanses -the,:R463-.-3 :contacts to open thus ,tinterruptingtthe ;circuit 5 to ithe :lll'litS position accumulator tmitrhub. -As..a result .the remaining impulses from :the .finitter 15M which ;cause the accumulator to step to :.the reeetqposition are; eliminatedifroni the. readout: circuit.

At ":325 :time on jthe -machine ,index .after the .8 tpulse ifrom :emitter tEM has :caused theiaccumulator to stepcto the'i9gposition aycircuit is completed from line filitFig. ;7a), wire.97, zcamscontact C18,..the2pick coil .mftt'ektysR561:and%line"=55. r'Ihe :R562 contacts in the -:maet tcircuitsnow. open :to filter out the 1 emitter 9 imapulse thus ;leavi-ng-the accumulator reset to A instead of the customary 0. In etfect,-then, the accumulator lisi'lesfitfillza manner by utilizing the step by step rimpulseszofitheireadout circuit-to reset'the ratchet wheel with :means for .cutting'of :the last pulse to allow the Mheel to at":9=, and this iscOnSidered-to be one a ofrthez novel features of: the present accumulator.

tlntthescaseiofua negative balance the -'reset operation @istdelayed one cycle to allow the accumulator'to-re-ad out zithrough :the inversion relay. This is accomplished by iinversion delay-contacts R459--'2 in the reset entry hub .ucircuit. L'Oma negativebalance, then, contacts R459-'2 etransfenand instead of picking .the reset relay R450 -the =pick coil 'of reset delay relayR455=is energized. Relay 53455 holds through a circuit which extends from -line 481, wire-i98, earn contact C25,contacts R455=1 now :close'd, -"the hold coilo'f-relay'R4'55 and line 55. The delay relay contacts R' 4'55-2 will transfer "and remain transferred from-L1 time of the delay cycle'uutil jl1;l

' tirne 'ofthe following-cycle. 'At'12 .0 time in'thefoIlowchecksrthe operation through the 9 contacts of each reset accumul-atongroup. ;For'example, the two accumulators of the particular group shown havebeencor- .rectly reset, a circuit -will be completed from line 151 (Fig. 7b), wire-65,-c-amcontact-C8, contacts 'R4503 still transferred, the 9 contacts on the tens position accumulator, the 9 contacts on the units position accumulator, contacts R450-4 still closed, the pick coil of reset test relay R448 and line 55. Relay R448 will hold through a circuit which extends from line 51 (Fig. 7a), wire 100, cam contact C16, contacts R448-1 now closed, the hold coil of relay R448 and line 55. The energization of relay R448 will allow the machine operations to continue whereas failure to energize relay R448 will start a chain reaction of interlocks (which form no part of the present invention and therefore are not shown) to stop all machine functions.

It is pointed out that each accumulator group will have its own related reset relay and reset test relay as in the case of the two position group shown and described e10 herein. .With such .an arrangement it..is possibleto test any-accumulator group that, has been signaled :to reset. Also, .ifanaccumulator group is found ,to .havefailejd to reset'correctly, t atzaccurnulator group may ,be .sub- 5 v.sequently.resetwithout disturbingany of the other accumulator groups.

Means are provided with this type ofaccumulatorfor taking'care .of the.situation-where the card field vbeing .accumulated is not completely punched. If the five used in the previous addition example was sensed from the units column of a two column field and theremainder of the fieldwas blank (no zero punches) the tens position accumulatorwould be allowed to make a complete revolution returning to 9 because its related count control relay received no impulse. To prevent this .un necessary movement a ,0 .hub tis provided connected to the 0 contact segment of the emitterEM. The hub may be plug connected to the tens position accu- ,llllllfllOPCIlU'Yihllb. As a-result a 0 impulse will be transmitteddo the-count control relay R462 and theqtens position accumulator-wheel willnot move since-the C28 .and C29;impulse circuitztoqthe add magnet is opened by the R462--2 contacts before thefirst impulse is transmitted. As many 0 .hubs may be provided as are required to take care ofall blank column accumulator positions.

1f ;the .0fimpulse. circuit, just described, is wired to accumulatonpositions.to prevent the accumulator wheels from unnecessarily turning provisions must be made to 'filtercoutxthe ".O impulse during readout cycles so that .-rea'dout may'take place. Referringrto the tens position .accumulator,.for example, when reset relay R453 is ener- .gizedcato initiate-a =readout cycle, the-R4532 contacts 'openttorprevent the-O impulse, or a-machine, brush .or counter impulse:forpthat matter, from energizing the :second'pickcoilofrelay R462. 'As a result the'R462--3 contacts in the readout circuit for the tens position accumulator will benormally closed to allow readout to take place.

While there have beenshown and described and pointed out ithe fundamental novel features of theinvention as appliedtto apreferred-embodiment, it will be understood "that various omissions and substitutions and changes in the form'and'details of the device illustrated-and in its 9 operation maybe-made bythose skilled in the art, without "departing 'from'thespirit of the invention. It is the intention, therefore, to be limited only as indicatedby the scopeof the-following claims.

What is claimed is:

111 acyclically operable accumulating mechanism 0f "the-step by =step type wherein'a digit entry in digit :reeeiving means of each-order is initiated by a-succession of impulses to amagnet, said-digit entry 'being'completed in a: particular order'when means under'control-of a digit rrepresenting impulsebecomes effective to interrupt-the gsuccessicm of pulses tothe magnet for that order, the combination of normally ineffective impulse transmitting "means 'for transmitting successive impulses to saidmag- :net, means for selectively rendering said impulse transmitting means operable, actuating means under control of said magnet for moving the digit receiving means to a digit representing position at the termination of each impulse to said magnet, normally closed add, subtract and reset control contacts associated with each order, a pair of 10 contacts under control of the digit receiving means of lower order and adapted to be closed thereby when a certain digit position is represented, cyclically operable means for emitting a single add impulse, and means dependent upon only the closure of said 10 contacts in a lower order for transmitting said add impulse through said control contacts to the corresponding magnet of the next higher order to enter a unit carry.

2. In a cyclically operable accumulating mechanism of the step by step type wherein a digit entry in digit receiving means of each order is initiated by a succession of impulses to a magnet, said digit entry being completed in a particular order when means under control of a digit representing impulse becomes effective to interrupt the succession of pulses to the magnet for that order, the combination of normally ineffective impulse trans mitting means for transmitting successive impulses to said magnet, means for selectively rendering said impulse transmitting means operable, actuating means under control of said magnet for moving the digit receiving means to a digit representing position at the termination of'each impulse to said magnet, cyclically operable means for emitting a single add impulse, means under control of the digit receiving means of lower order when a certain digit is represented for transmitting said add impulse during adding and subtracting cycles to the magnets of all higher orders, and means under control of the highest order for transmitting said add impulse to the magnet of said lower order causing the digit receiving means in said lower order to move to the next digit representing position.

3. In a cyclically operable accumulating mechanism of the step by step type wherein a digit entry in digit receiving means of each order is initiated by a succession of impulses to a magnet, said digit entry being completed in a particular order when means under control of a digit representing impulse becomes efiective to interrupt the succession of pulses to the magnet for that order, the combination of normally ineffective impulse transmitting means for transmitting successive impulses to said magnet, means for selectively rendering said impulse transmitting means operable, actuating means under control of said magnet for moving the digit receiving means to a digit representing position at the termination of each impulse to said magnet, readout means associated with said digit receiving means and movable therewith to represent the digit entered in said digit receiving means, cyclically operable means for transmitting digit representing impulses in succession to said readout means, means for selectively rendering said digit representing impulse transmitting means and said readout means effective to read out the digit entered in said digit receiving means, means for concurrently initiating a reset operation whereby said cyclically operable means will also transmit digit representing impulses to said digit receiving means, and means under control of said digit receiving means when the first reset, impulse is received for preventing the remaining digit representing impulses from reading out of said readout means.

4. In a cyclically operable accumulating mechanism of the step by step type wherein a digit entry in digit receiving means of each order is initiated by a succession of impulses to a magnet, said digit entry being completed in a particular order when means under control of a digit representing impulse becomes effective to interrupt the succession of pulses to the magnet for that order, the combination of normally ineffective impulse transmitting means for transmitting successive impulses to said magnet, means for selectively rendering said impulse transmitting means operable, actuating-means under control of said magnet for moving the digit receiving means to adigit representing position at the termination of each impulse to said magnet, cyclically operable means for transmitting digit representing impulses, means for selectively rendering said cyclically operable means efiective after completion of digit entry to transmit the digit representing impulses to said digit receiving means to reset same, and cyclically operable means for preventing the last digit representing impulse from entering said digit receiving means.

5. In a cyclically operable accumulating mechanism of the step by step type wherein a digit entry in digit receiving means of each order is initiated by a succession of impulses to a magnet, said digit entry being completed in a particular order when control means operated by a digit representing impulse becomes effective to interrupt the succession of pulses to the magnet for that order, the combination of normally ineffective impulse transmitting means for transmitting successive impulses to said magnet, means for selectively rendering said impulse transmitting means operable, actuating means under control of said magnet for moving the digit receiving means to a digit representing position at the termination of each impulse to said magnet, cyclically operable means for transmitting digit representing impulses, normally ineffective means for transmitting a predetermined digit representative impulse from said cyclically operable means, and means for selectively rendering said last named means effective to operate said control means to prevent the entry receiving means from receiving impulses from said first impulse transmitting means.

6. In a cyclically operable accumulating mechanism of the step by step type wherein a digit entry in digit receiving means of each order is initiated by a succession of impulses to a magnet, said digit entry being completed in a particular order when means under control of a digit representing impulse becomes effective to interrupt the succession of pulses to the magnet for that order, the combination of normally ineffective impulse transmitting means for transmitting successive impulses to said magnet, entry control means selectively operable to render said impulse transmitting means operable, actuating means under control of said magnet for moving the digit receiving means to a digit representing position at the termination of each impulse to said magnet, an output control hub associated with said accumulating mechanism, cyclically operable means for emitting a timed impulse, and means under control of said entry control means and elfective upon operation of the latter to transmit said timed impulse to said control hub when the digit receiving means in the highest order stands at 9, said means being effective to prevent the transmission of said timed impulse to said control hub if said entry control means is not operated.

References Cited in the file of this patent UNITED STATES PATENTS 

